Kenwood NXR-800 Service Manual page 31

Pin No. Name I/O
CN57 (To X55-310 CN42)
1 GND - Ground
2 GND - Ground
3 WP O Write protection of EEPROM
4 D_GND - Digital Ground
5 E2PROM_SDA I/O Data of EEPROM
6 CONT_5.0V - 5V constant voltage
7
E2PROM_SCL O Clock of EEPROM
8 D_GND - Digital Ground
9 AD_CS O Enable for 8ch DAC
10 IF_BW_SW O IF_ bandwidth switch
11 AD_DAT_WRITE O Data 0 for 3 line serial
12 NC (IF_NW_SW) - No connection
13 AD_CLK O Clock 0 for 3 line serial
14 GND - Ground
15 AD_DAT_READ I Analog data of 8ch ADC
16 NC - No connection
17 CONT_5.0V - 5V constant voltage
18 PLL_LOCK_DET I PLL1,2 lock detection
19 AGC_RSSI - No connection
20 PLL2_EN O PLL 2 enabling signal
21 FM_RSSI I RSSI signal input
22 NC - No connection
23 GND - Ground
24 PLL_PWR_SAVE O PLL1,2 chip selection signal
25 RX_AUDIO I Reception audio signal
26 SIF_DAT O Data 0 for 3 line serial
27 GND - Ground
28 SIF_CLK O Clock 0 for 3 line serial
29 3DA_EN O Enable for 3ch DAC
30 PLL1_EN O PLL 1 enabling signal
31 VCO_BAND_SW O VCO bandwidth switch
32 DDS_EN O Enable for DDS
33 RX_POWER_SAVE O Power saving signal of RX unit
34 NC - No connection
35 GND - Ground
36 GND - Ground
CN58 (To CONTROL I/O 25pin D-sub Connector)
1 NC - No connection
2 NC - No connection
3 NC - No connection
4 NC (RSSI) - No connection (RSSI)
TERMINAL FUNCTION
Function Pin No. Name I/O
5 BER_CLK O for Bit Error Rate Clock
6 NC - No connection
External monitor switch input
7 EMON I
"L"=Monitor on, "H"=Monitor off
8 NC - No connection
External press-to-talk switch input
9 EPTT I
"L"=PTT on, "H"=PTT off
10 AI1 I Programmable function input 1
Squelch control output
11 SC O
"L"=Busy, "H"=Not busy
12 AI2 I Programmable function input 2
13 BER_DAT O for Bit Error Rate Data
14 AI3 I Programmable function input 3
15 TXG - TX siganal ground for TA,TD
16 DG - Control line ground
17 IO1 I/O Programmable function input/output 1
TX-DATA input (data or Signaling)
Input impedance=600Ω
18 TD I Coupling=AC coupling
Deviation=0.75kHz (Wide)/ 0.75kHz
(Narrow) at 100Hz 0.5Vpp input
19 IO2 Programmable function input/output 2
TX audio input (voice)
Input impedance=600Ω
Coupling=AC coupling
20 TA I
Frequency response=Pre-emphasis curve
Deviation=60% deviation at 1kHz
280mVrms±25mV input
21 IO3 I/O Programmable function input/output 3
RX-DATA output (data or Signaling)
output impedance=1kΩ or less
Coupling=AC coupling
Non-squelched
22 RD O
Frequency respones=±2.5dB at
10~3000Hz
Output level=70~90mVrms (standard
modulation)
23 IO4 Programmable function input/output 4
RX-Audio output (voice)
output impedance=1kΩ or less
Coupling=AC coupling
Squelched
24 RA O
Frequency respones=De-emphasis
curve
Output level=360~440mVrms (stan-
dard modulation)
25 IO5 I/O Programmable function input/output 5
26 RXG - RX siganal ground for RA, RD
27 IO6 I/O Programmable function input/output 6
Speaker mute signal input.
28 SPM I
"L"=Mute on
29 NC - No connection
NXR-800
Function
31